Low Distortion Lens – M603514005520F

M603514005520F is Low distortion 2-Megapixel 1/4″ CCTV lens with Built-In IR Filter, 65° M6.5×0.25 mount, F2.0 aperture, for security applications.

3.5mm M6.5 Miniature Low Distortion Lens for Machine Vision

This 3.5mm M6.5 miniature low distortion lens is designed for compact 2MP imaging systems that require a wide field of view and controlled geometric distortion. With a 65° diagonal FOV, F2.0 aperture, and distortion below 1.5%, it provides a practical optical solution for embedded machine vision, industrial inspection, and space-constrained imaging devices.

The combination of a 3.5mm focal length, 55° horizontal FOV, and <1.5% distortion makes this lens suitable for applications where a relatively broad viewing area is required without the strong image deformation associated with fisheye optics. Its compact M6.5 × 0.25 mount and 4.21mm TTL also make it suitable for miniature embedded camera assemblies.

For engineers evaluating field coverage and focal length, the FOV Calculator can help estimate the relationship between sensor size, focal length, and viewing area.

M6.5 Low Distortion Lens Core Highlights

• <1.5% Low Distortion: Helps maintain accurate image geometry for inspection and embedded vision.
• 3.5mm Wide-Angle Optics: Provides 65° diagonal and 55° horizontal FOV on a 1/4″ sensor.
• Compact M6.5 Mount: Suitable for miniature camera modules and space-constrained equipment.
• F2.0 Fixed Aperture: Provides a practical balance between light transmission and optical compactness.
• 0.1m M.O.D.: Supports relatively close-range imaging in compact inspection and sensing systems.

3.5mm M6.5 Low Distortion Lens Applications

Core Application Scenes

This 3.5mm M6.5 low distortion lens is particularly suited to compact camera systems where installation space is limited but the imaging system still needs a moderately wide viewing angle. Its <1.5% distortion helps preserve the relative geometry of objects in the image, making it more suitable for measurement-oriented imaging than conventional wide-angle optics with stronger barrel distortion.

In embedded machine vision, the small M6.5 mount and short 4.21mm TTL can help camera designers integrate the lens into compact housings, inspection modules, and automated equipment. The 0.1m minimum object distance also supports relatively close-range imaging where the camera must be positioned near the inspection target.

For industrial equipment, this lens can be used for component presence inspection, small-part positioning, label or code observation, and compact equipment monitoring where 2MP image resolution is sufficient. Its 55° horizontal FOV provides broader scene coverage than a narrow-angle lens while retaining controlled distortion.

The lens can also be considered for embedded robotic cameras and compact visual sensing modules where mechanical space is restricted. For broader information about optical configuration and lens performance, engineers can refer to the Optical Design resources in the TOWIN Knowledge Center.

Compatible Device List

• Compact Machine Vision Cameras: Suitable for 1/4″ 2MP camera modules used in inspection and positioning systems.
• Embedded Vision Modules: The M6.5 × 0.25 mount and 4.21mm TTL are suited to compact camera assemblies with limited internal space.
• Industrial Inspection Equipment: Appropriate for close-range inspection of components, labels, connectors, and small mechanical parts.
• Robotic Vision Modules: The wide-angle 3.5mm focal length can provide useful scene coverage for compact robotic sensing units.
• OEM Camera Systems: The miniature optical structure is suitable for customized embedded camera designs where mounting dimensions are critical.

Designed for compact machine vision and embedded industrial inspection applications.

For applications requiring different sensor formats, focal lengths, or mechanical configurations, TOWIN also provides a broader range of Machine Vision Lens solutions and M6/M7/M8 Miniature Lenses.

Frequently Asked Questions

Q: What sensor size is this 3.5mm lens designed for?
A: This lens is designed for a 1/4″ image format and provides a 65° diagonal, 55° horizontal, and 36° vertical field of view based on the specified optical configuration.

Q: Is this lens a low distortion lens?
A: Yes. The specified distortion is below 1.5%, making it suitable for imaging applications where controlled geometric distortion is important.

Q: Is this lens a fisheye lens?
A: No. Although the lens provides a relatively wide field of view, its <1.5% distortion is not characteristic of a fisheye design. It is better classified as a wide-angle low distortion lens.

Q: What type of camera mount does this lens use?
A: It uses an M6.5 × 0.25 mount, making it suitable for miniature camera modules and compact embedded imaging equipment.

Q: What applications is this lens suitable for?
A: It is suitable for compact machine vision, embedded industrial inspection, component observation, robotic vision modules, and other space-constrained imaging systems.

Q: Can this lens be used for close-range imaging?
A: Yes. The specified minimum object distance is 0.1m, allowing the lens to support relatively close-range imaging applications.

Q: What does the 5P + IRCF structure mean?
A: The optical structure uses five plastic optical elements together with an IR-cut filter component. The IRCF helps control unwanted infrared transmission for visible-light imaging.

Q: What does the F2.0 aperture provide?
A: The fixed F2.0 aperture provides a practical amount of light transmission for compact imaging systems while maintaining a simple fixed-aperture configuration.

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